Used 2021 GMC Terrain for Sale in New Haven, CT
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2,021 listings
$19,520great price$2,654 below market60,395 milesNo accidents, 2 Owners, Personal use4cyl AutomaticAxis Chevrolet (72 mi away)- AWD/4WD
- Back-up camera
- Bluetooth
- Navigation
- Leather Seats
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Located in Jersey City, NJ / 72 miles away from New Haven, CT
CARFAX One-Owner. Clean CARFAX. AWD. Ebony Twilight Metallic 2021 GMC Terrain SLT AWD 9-Speed Automatic 1.5L DOHCAxis Motorcars has one of the largest...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
26 Combined MPG (25 City/28 Highway)
Listing Information:
VIN: 3GKALVEV5ML386070
Stock: STK386070
Certified Pre-Owned: No
Listed since: 03-13-2024- Price Drop
$24,995great price$3,128 below market11,059 milesNo accidents, 1 Owner, Personal use4cyl AutomaticStation GMC (103 mi away)- AWD/4WD
- Back-up camera
- Bluetooth
- Keyless Entry/Start
- Upgraded Headlights
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Located in Mansfield, MA / 103 miles away from New Haven, CT
Clean CARFAX. AWD, 6 Speakers, 6-Speaker Audio System Feature, 8-Way Power Driver Seat Adjuster, Adaptive Cruise Control, Black GMC Center Caps w/Blac...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
26 Combined MPG (25 City/28 Highway)
Listing Information:
VIN: 3GKALTEV3ML357249
Stock: Z1697
Certified Pre-Owned: Yes
Listed since: 04-01-2024 - Price Drop
$18,754great price$2,774 below market65,032 miles1 Accident, 1 Owner, Personal use4cyl AutomaticGeneration Buick GMC (40 mi away)- AWD/4WD
- Back-up camera
- Bluetooth
- Keyless Entry/Start
- Upgraded Headlights
Close
Located in Bohemia, NY / 40 miles away from New Haven, CT
Certified. Graphite Gray Metallic 2021 GMC Terrain SLE AWD 9-Speed Automatic 1.5L DOHC AWD. Recent Arrival! 25/28 City/Highway MPG GMC Certified Pre...
AutoCheck Vehicle History Summary
Accident Free Vehicle: No
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
26 Combined MPG (25 City/28 Highway)
Listing Information:
VIN: 3GKALTEV0ML319283
Stock: U416LS
Certified Pre-Owned: Yes
Listed since: 03-17-2024 - Price Drop
$19,645great price$3,330 below market48,682 milesNo accidents, 1 Owner, Personal use4cyl AutomaticCranbury Buick GMC (108 mi away)- AWD/4WD
- Back-up camera
- Bluetooth
- Keyless Entry/Start
- Upgraded Headlights
Close
Located in Cranbury, NJ / 108 miles away from New Haven, CT
WiFi Hotspot, Onboard Communications System, iPod/MP3 Input, Back-Up Camera, All Wheel Drive, Turbo, ELEVATION EDITION, LIFTGATE, REAR POWER PROGRAMMA...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
26 Combined MPG (25 City/28 Highway)
Listing Information:
VIN: 3GKALTEV3ML302610
Stock: P4826
Certified Pre-Owned: Yes
Listed since: 01-02-2024 
$17,500great price$3,365 below market65,318 miles1 Accident, 2 Owners, Personal use4cyl AutomaticJD Motors (80 mi away)- AWD/4WD
- Back-up camera
- Bluetooth
- Leather Seats
- Sunroof/Moonroof
Close
Located in Elizabeth, NJ / 80 miles away from New Haven, CT
This 2021 GMC Terrain 4dr AWD 4dr SLT features a 1.5L 4 CYLINDER 4cyl Gasoline engine. It is equipped with a 9 Speed Automatic transmission. The vehic...
AutoCheck Vehicle History Summary
Accident Free Vehicle: No
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
26 Combined MPG (25 City/28 Highway)
Listing Information:
VIN: 3GKALVEV5ML343073
Stock: 43073
Certified Pre-Owned: No
Listed since: 01-25-2024- Price Drop
$22,999great price$3,525 below market31,140 milesNo accidents, 1 Owner, Personal use4cyl AutomaticHyundai of Trenton (120 mi away)- AWD/4WD
- Back-up camera
- Bluetooth
- Navigation
- Leather Seats
Close
Located in Ewing, NJ / 120 miles away from New Haven, CT
Ebony Twilight Metallic 2021 GMC Terrain SLT AWD 9-Speed Automatic 1.5L DOHC AWD. Odometer is 7521 miles below market average! 25/28 City/Highway MPG
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
26 Combined MPG (25 City/28 Highway)
Listing Information:
VIN: 3GKALVEV9ML336403
Stock: 336403F01
Certified Pre-Owned: No
Listed since: 04-19-2024 - Price Drop
$24,000great price$2,958 below market28,900 milesNo accidents, 1 Owner, Personal use4cyl AutomaticAutoMax PreOwned Framingham (103 mi away)- AWD/4WD
- Back-up camera
- Bluetooth
- Sunroof/Moonroof
- Keyless Entry/Start
Close
Located in Framingham, MA / 103 miles away from New Haven, CT
AWD SLE Elevation Edition - Satin Steel Metallic Gray exterior on Jet Black interior with Panorama Sunroof / Moonroof, Remote Start, Apple CarPlay / A...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
26 Combined MPG (25 City/28 Highway)
Listing Information:
VIN: 3GKALTEV8ML361720
Stock: 361720
Certified Pre-Owned: No
Listed since: 02-28-2024 
$20,912great price$2,891 below market26,420 milesNo accidents, 1 Owner, Personal use4cyl AutomaticAxis Chevrolet (72 mi away)- AWD/4WD
- Back-up camera
- Bluetooth
- Keyless Entry/Start
- Upgraded Headlights
Close
Located in Jersey City, NJ / 72 miles away from New Haven, CT
CARFAX One-Owner. Clean CARFAX. AWD. Summit White 2021 GMC Terrain SLE AWD 9-Speed Automatic 1.5L DOHCAxis Motorcars has one of the largest selections...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
26 Combined MPG (25 City/28 Highway)
Listing Information:
VIN: 3GKALTEV1ML370128
Stock: STK370128
Certified Pre-Owned: No
Listed since: 04-17-2024
$24,935great price$1,970 below market15,123 milesNo accidents, 1 Owner, Personal use4cyl AutomaticNorth Bay Buick GMC (54 mi away)- AWD/4WD
- Back-up camera
- Bluetooth
- Navigation
- Sunroof/Moonroof
Close
Located in Great Neck, NY / 54 miles away from New Haven, CT
Certified. 2021 GMC Terrain SLE Ebony Twilight Metallic This Terrain SLE is nicely equipped with Driver Convenience Package (8-Way Power Driver Seat A...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
26 Combined MPG (25 City/28 Highway)
Listing Information:
VIN: 3GKALTEV2ML318863
Stock: 11754P
Certified Pre-Owned: Yes
Listed since: 04-01-2024
$23,987great price$2,516 below market22,816 milesNo accidents, 1 Owner, Personal use4cyl AutomaticBanks Chevrolet Buick GMC (149 mi away)- AWD/4WD
- Back-up camera
- Bluetooth
- Keyless Entry/Start
- Upgraded Headlights
Close
Located in Concord, NH / 149 miles away from New Haven, CT
2 USB Data Ports w/Auxiliary Input Jack,4-Way Manual Front Passenger Seat,6-Speaker Audio System Feature,8-Way Power Driver Seat Adjuster,Adaptive Cru...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
26 Combined MPG (25 City/28 Highway)
Listing Information:
VIN: 3GKALTEV9ML327205
Stock: T27205
Certified Pre-Owned: Yes
Listed since: 02-12-2024
$21,695great price$1,864 below market31,545 milesNo accidents, 1 Owner, Personal use4cyl AutomaticCranbury Buick GMC (108 mi away)- AWD/4WD
- Back-up camera
- Bluetooth
- Keyless Entry/Start
- Upgraded Headlights
Close
Located in Cranbury, NJ / 108 miles away from New Haven, CT
FUEL EFFICIENT 28 MPG Hwy/25 MPG City! ONLY 31,543 Miles! SLE trim. Onboard Communications System, iPod/MP3 Input, Back-Up Camera, All Wheel Drive, Tu...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
26 Combined MPG (25 City/28 Highway)
Listing Information:
VIN: 3GKALTEV7ML367511
Stock: P5077
Certified Pre-Owned: Yes
Listed since: 03-06-2024
$21,250great price$2,166 below market41,056 milesNo accidents, 1 Owner, Personal use4cyl AutomaticStream Auto Outlet Islip (43 mi away)- AWD/4WD
- Back-up camera
- Bluetooth
- Leather Seats
- Sunroof/Moonroof
Close
Located in Islip, NY / 43 miles away from New Haven, CT
2021 GMC Terrain SLT Quicksilver Metallic 9-Speed Automatic AWD, 2 USB Data Ports, 2 USB Data Ports w/SD Card Reader, 3.47 Axle Ratio, 4-Wheel Disc Br...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
26 Combined MPG (25 City/28 Highway)
Listing Information:
VIN: 3GKALVEV6ML304525
Stock: W296
Certified Pre-Owned: No
Listed since: 03-27-2024- Price Drop
$22,635great price$2,313 below market62,595 milesNo accidents, 1 Owner, Personal use4cyl AutomaticMcGee Mazda of Claremont (143 mi away)- AWD/4WD
- Back-up camera
- Bluetooth
- Navigation
- Sunroof/Moonroof
Close
Located in Claremont, NH / 143 miles away from New Haven, CT
2021 GMC Terrain SLE AWD. 4D Sport Utility Summit White AWD 9-Speed Automatic 1.5L DOHC 25/28 City/Highway MPG *Why Buy at McGee Mazda Claremont* --...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
26 Combined MPG (25 City/28 Highway)
Listing Information:
VIN: 3GKALTEV2ML343455
Stock: ZP392
Certified Pre-Owned: No
Listed since: 03-05-2024 
$20,500good price$1,129 below market60,284 milesNo accidents, 1 Owner, Personal use only4cyl AutomaticHealey Chevrolet (53 mi away)- AWD/4WD
- Back-up camera
- Bluetooth
- Leather Seats
- Keyless Entry/Start
Close
Located in Poughkeepsie, NY / 53 miles away from New Haven, CT
Certified. Summit White 2021 GMC Terrain SLT AWD 9-Speed Automatic 1.5L DOHC AWD. Don't be tricked by below market priced vehicles that charge exorbit...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
26 Combined MPG (25 City/28 Highway)
Listing Information:
VIN: 3GKALVEV2ML390691
Stock: BUR4192
Certified Pre-Owned: No
Listed since: 03-17-2024
$29,999fair price$544 below market15,532 milesNo accidents, 1 Owner, Personal use4cyl AutomaticCentral Buick GMC (110 mi away)- AWD/4WD
- Back-up camera
- Bluetooth
- Navigation
- Leather Seats
Close
Located in Norwood, MA / 110 miles away from New Haven, CT
SOOOOO SHARP ! This Loaded, Low Mileage, Certified SLT has it all including sunroof, heated leather seating, navigation, backup camera, plenty of safe...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
26 Combined MPG (25 City/28 Highway)
Listing Information:
VIN: 3GKALVEV4ML367865
Stock: GM2818
Certified Pre-Owned: Yes
Listed since: 03-12-2024
$22,239fair price$377 below market37,521 milesNo accidents, 1 Owner, Personal use4cyl AutomaticCranbury Buick GMC (108 mi away)- AWD/4WD
- Back-up camera
- Bluetooth
- Leather Seats
- Keyless Entry/Start
Close
Located in Cranbury, NJ / 108 miles away from New Haven, CT
LOW MILES - 37,700! FUEL EFFICIENT 28 MPG Hwy/25 MPG City! Heated Leather Seats, Back-Up Camera, Power Liftgate, All Wheel Drive, TRANSMISSION, 9-SPEE...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
26 Combined MPG (25 City/28 Highway)
Listing Information:
VIN: 3GKALVEV0ML344972
Stock: P5133
Certified Pre-Owned: No
Listed since: 03-18-2024- Price Drop
$20,799great price$2,290 below market30,909 miles2 Accidents, 1 Owner, Personal use4cyl AutomaticHyundai of Trenton (120 mi away)- AWD/4WD
- Back-up camera
- Bluetooth
- Keyless Entry/Start
- Upgraded Headlights
Close
Located in Ewing, NJ / 120 miles away from New Haven, CT
Summit White 2021 GMC Terrain SLE AWD 9-Speed Automatic 1.5L DOHC AWD. Odometer is 3531 miles below market average! 25/28 City/Highway MPG
AutoCheck Vehicle History Summary
Accident Free Vehicle: No
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
26 Combined MPG (25 City/28 Highway)
Listing Information:
VIN: 3GKALTEV7ML346173
Stock: 346173FM1
Certified Pre-Owned: No
Listed since: 04-19-2024 - Price Drop
$26,498good price$1,747 below market19,650 milesNo accidents, 1 Owner, Personal use4cyl AutomaticHerb Chambers Cadillac of Lynnfield (130 mi away)- AWD/4WD
- Back-up camera
- Bluetooth
- Navigation
- Leather Seats
Close
Located in Lynnfield, MA / 130 miles away from New Haven, CT
INSPECTION COMPLETED Every Herb Chambers Certified pre-owned vehicles receives a complete multi-point inspection by factory trained technicians who in...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
26 Combined MPG (25 City/28 Highway)
Listing Information:
VIN: 3GKALVEV4ML316687
Stock: CL2897
Certified Pre-Owned: No
Listed since: 04-16-2024 - Price Drop
$24,400good price$1,559 below market20,346 milesNo accidents, 1 Owner, Personal use4cyl AutomaticMcGovern Subaru (165 mi away)- AWD/4WD
- Back-up camera
- Bluetooth
- Navigation
- Keyless Entry/Start
Close
Located in Newington, NH / 165 miles away from New Haven, CT
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
26 Combined MPG (25 City/28 Highway)
Listing Information:
VIN: 3GKALTEVXML362867
Stock: SB2569
Certified Pre-Owned: No
Listed since: 03-27-2024 
$21,250good price$1,862 below market61,132 milesNo accidents, 1 Owner, Rental vehicle4cyl AutomaticHamden Chevrolet (4 mi away)- AWD/4WD
- Back-up camera
- Bluetooth
- Leather Seats
- Keyless Entry/Start
Close
Located in Hamden, CT / 4 miles away from New Haven, CT
Blue Emerald Metallic 2021 GMC Terrain SLT AWD 9-Speed Automatic 1.5L DOHC CERTIFIED ELIGIBLE, ONE OWNER, CLEAN CARFAX/NO ACCIDENTS REPORTED, ALL WHEE...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: No
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
26 Combined MPG (25 City/28 Highway)
Listing Information:
VIN: 3GKALVEV2ML334976
Stock: P4624
Certified Pre-Owned: No
Listed since: 02-29-2024
$22,099good price$1,972 below market54,698 milesNo accidents, 1 Owner, Rental vehicle4cyl AutomaticKey Honda of Rutland (156 mi away)- AWD/4WD
- Back-up camera
- Bluetooth
- Leather Seats
- Keyless Entry/Start
Close
Located in Rutland, VT / 156 miles away from New Haven, CT
Summit White 2021 GMC Terrain SLT We want your trade, it's value may be higher now than ever. Ask for details! This Terrain SLT is nicely equipped wit...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: No
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
26 Combined MPG (25 City/28 Highway)
Listing Information:
VIN: 3GKALVEV4ML390854
Stock: K5663
Certified Pre-Owned: No
Listed since: 03-06-2024
Consumer Reviews for the GMCÂ Terrain
Read recent reviews for the GMCÂ Terrain
2021 GMV Terrain SLT
Stgcret, 04/19/2021
2021 GMC Terrain SLT 4dr SUV (1.5L 4cyl Turbo 9A)
As of today, April 19/2023 I still own my Terrain purchased in November 2020. It has, so far, not given me a minute's issue.
The 1.5L Turbo is "okay" but the 2.0L Turbo is so much better. The Terrain is a very well thought out vehicle. Back seat flip flat at the push of a button and easily clicks back in to place. Seats are at hip height, which at 71, makes them very easy to slide … in and out. The front bucket seats are fairly comfortable with many power adjustments. The front seats could use another 1/2" to 1" of width. I would buy this beauty again.
UPDATE: I purchase my 2021 GMC Terrain brand new in November 2020 before the chip shortage, that isn't an issue with the 2021 at all. I just hit 20,000 miles a couple of weeks ago and all-in-all has been a pleasure to drive. I'm a big guy of 6' 2" and 285 and I easily slide in and out of my Terrain. Quiet ride and efficient and peppy 1.5L Turbo motor, although I would have preferred the 2.0L Turbo like I had in my 2018 Terrain, but the 2020 was the last year for the 2.0L
On the SLT, that I have, are many positions to adjust the front seat and I do prefer the leather over cloth seats. For a 2-row seat SUV, there is plenty of room and the seats fold down at the touch of button or pull that works with the effort of one finger. I really like the info system and Sirius Radio. I have not used the Navigation or phone interface because I just don't need to. One oddball fact I discovered though is that when you want to take out the Cabin Filter, you have to use a 5.5 mm socket and that size is difficult to find. They need to go to a more conventional size like a 6 mm or 1/4 inch.
UPDATE: I drove my 2021 Terrain SLT Elevation Edition out of the dealer showroom on 11/27/2020. I am 6' 2" and 72 yrs old. I specifically like the way I can slide in and easily slide out of the Terrain. I also find the front seat very comfortable and easy to adjust and has a nice lumbar support. I don't find the road noise so bad, but maybe that is because I have Talk Radio on all the time. I do agree that a 2.0 Turbo would be a better engine option. I owned a 2018 Terrain Denali with the 2.0L and I thought I was in a rocket when I stepped on the gas. I have owned my 2021 for 31 months now and have put 21,530 miles on the ol' girl and have not had a single issue, but there was one "what were they thinking moment" the screw for the driving compartment air filter is a 5.5 mm! I did change that filter at 18,000 miles although the manual called for 30,000 miles. Such an odd and hard to find size. I have changed the oil and filter every 5,000 miles and rotated the tires.
I would like to see the same vehicle but 10" to 12" longer and maybe 4" to 6" wider to fit just a bit more beefy seat like the Tahoe has. Other than that I will most likely buy another Terrain and for sure if they reinstate the 2.0L Turbo.
Used 2021 GMC Terrain in New Haven, CT Values
Estimated values
2021 GMC Terrain SLT 4dr SUV AWD (1.5L 4cyl Turbo 9A) with no options
| Condition | Trade-In | Private Party | Dealer Retail |
|---|---|---|---|
| Outstanding | $19,368 | $21,656 | $24,045 |
| Clean | $19,043 | $21,275 | $23,605 |
| Average | $18,500 | $20,642 | $22,870 |
| Rough | $17,796 | $19,817 | $21,915 |
The average list price of a used 2021 GMC Terrain in New Haven, Connecticut is $22,410. The average mileage on a used GMC Terrain 2021 for sale in New Haven, Connecticut is 38,579. Based on the average mileage of 38,579 for used 2021 GMC Terrain for sale in New Haven, CT and using an average vehicle condition rating, which means the vehicle may have a few mechanical and/or cosmetic problems and may require a considerable amount of reconditioning, we appraise the average trade-in value of a used GMC Terrain 2021 in New Haven, Connecticut to be $18,500.